RO

Royal Observatory Greenwich

Home of time and space, stand on the Prime Meridian Line and explore astronomy and navigation history.

Royal Observatory Greenwich

About

Stand with one foot in each hemisphere at the Prime Meridian, where time officially begins and GPS coordinates read exactly 0°0'0". Charles II founded this hilltop observatory in 1675 to solve navigation puzzles—today tourists queue to straddle the brass line marking Earth's division while the Time Ball drops at 1pm as it has since 1833.

Time and Space Made Real

Harrison's revolutionary marine chronometers gleam in climate-controlled cases—these clocks solved the longitude problem, saving countless ships. The Shepherd Gate Clock displays Greenwich Mean Time to the world. Flamsteed House showcases Wren's octagonal observatory where astronomy began.

Touch actual meteorites, discover your weight on Jupiter, and see the telescope that defined the Prime Meridian. The planetarium runs shows from "London's Night Sky" to "Black Holes"—book ahead for weekend shows. Evening astronomy sessions use the Annie Maunder telescope when skies permit.

Views and Visits

The hilltop location offers London's finest panorama—see Canary Wharf's towers pierce the skyline while the Thames curves through history. The Meridian laser beam shoots north across night skies. Combine with Maritime Museum and Cutty Sark using the Day Explorer ticket.

Arrive early to avoid meridian line queues. The cafe serves lunch with views. Free to explore grounds; paid entry for instruments and planetarium. DLR to Cutty Sark or Greenwich rail, then a steep 15-minute climb rewards with science, history, and selfies at the center of space and time.